Table 2.

Variables that make up the RAPID score used for outcome prediction in adult pleural infection

	Score
Renal function (blood urea nitrogen)
<14 mg/dL	0
14–23 mg/dL	1
>23 mg/dL	2
Age
<50 years	0
50–70 years	1
>70 years	2
Purulence of pleural fluid
Purulent	0
Non-purulent	1
Infection setting
Community-acquired	0
Hospital-acquired	1
Dietary factors (serum albumin)
≥2.7 gm/dL	0
<2.7 gm/dL	1

Notes: Risk categories: score 0–2 low risk; score 3–4 medium risk; score 5–7 high risk. Data from Rahman et al.⁹